<template>
  <div class="custom-page tags-page">
    <MainLayout>
      <template #mainLeft>
        <TagsBar
          v-if="$categoriesAndTags.tags.length"
          :tagsData="$categoriesAndTags.tags"
          :tag="tag"
        />
        <PostList
          :currentPage="currentPage"
          :perPage="perPage"
          :tag="tag"
        />
        <Pagination
          :total="total"
          :perPage="perPage"
          :currentPage="currentPage"
          @getCurrentPage="handlePagination"
          v-if="Math.ceil(total / perPage) > 1"
        />
      </template>
      <template #mainRight>
        <TagsBar
          v-if="$categoriesAndTags.tags.length"
          :tagsData="$categoriesAndTags.tags"
          :tag="tag"
        />
      </template>
    </MainLayout>
  </div>
</template>

<script>
import MainLayout from '@theme/components/MainLayout'
import PostList from '@theme/components/PostList'
import Pagination from '@theme/components/Pagination'
import TagsBar from '@theme/components/TagsBar'

export default {
  data(){
    return {
      tag: '',
      total: 0, // 总长
      perPage: 10, // 每页长
      currentPage: 1// 当前页
    }
  },
  components: { MainLayout, PostList, Pagination, TagsBar },
  beforeMount() {
    const tag = this.$route.query.tag
    if (tag) {
      this.tag = tag
      this.total = this.$groupPosts.tags[tag].length
    } else {
      this.total = this.$sortPosts.length
    }
    if (this.$route.query.p) {
      this.currentPage = Number(this.$route.query.p)
    }
  },
  methods: {
    handlePagination(i) { // 分页
      this.currentPage = i
    }
  },
  watch: {
    '$route.query.tag'() {
      this.tag = this.$route.query.tag
      if (this.tag) {
        this.total = this.$groupPosts.tags[this.tag].length
      } else {
        this.total = this.$sortPosts.length
      }
      this.currentPage = 1

    }
  }
}
</script>

<style lang='stylus'>
.tags-page
  .tags-wrapper 
    position sticky
    top ($navbarHeight + .9rem)
    max-height calc(100vh - 10rem)
    min-height 4.2rem
    @media (max-width: $MQMobile)
      display none
    .tags
      max-height calc(100vh - 14rem)
      min-height 2.2rem
      overflow-x hidden
      overflow-y auto
      transition all .2s
      &::-webkit-scrollbar-track-piece
        background-color:rgba(0,0,0,.05)
      &::-webkit-scrollbar-thumb:vertical
        background-color:rgba(0,0,0,.15)
      &:hover
        &::-webkit-scrollbar-track-piece
          background-color:rgba(0,0,0,.1)
        &::-webkit-scrollbar-thumb:vertical
          background-color:rgba(0,0,0,.25)

.tags-page
  .main-left
    .tags-wrapper
      position relative
      top 0
      padding .9rem 1.5rem
      margin-bottom .9rem
      max-height 15rem
      border-radius 0
      display none
      @media (max-width: $MQMobile)
        display block
      .tags
        max-height 11.5rem
</style>

